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v (No Model.) 3 Sheets-Sheet 2.

R. DUNLOP. v Lime Kiln. No. 229,811. Patented July I3, 1880.

(No Model.) 3 sheets sheet 3.

R. DUNLOP. Lime Kiln. No. 229,811. Patented July 13, 1880.

N- PETEflS, FNOTO-LITNOGRAPKER WASHINGTON D C ECUNITED STATES PATENTOFFICE.

ROBERT DUNLOP, OF JAMESVILLE, NEW YORK.

LIMEKILN.

SPECIFICATION forming part of Letters Patent No. 229,811, dated July 13,1880.

7 Application filed May 27, 1880. (No model.)

To all whom at may concern:

Be it known that I, ROBERT DUNLOP,-f J amesville, in the county ofOnondaga, in the State of New York, have invented new and usefulImprovements in Limekilns, of which the following, taken in connectionwith the accompanying drawings, isafull, clear, and exact description.

The nature of this invention consists chiefly in dividing the stack orchamber of a limekiln into compartments by vertical partitions andproviding each of said compartments with two discharge-openings,arranged one above the other, and a horizontal sliding plate placedbetween said discharge-openings, by which means the lime may be drawnfrom the back or from the front part of the kiln, according to 'thestate of burning, and thus the burning process can be, properlycontrolled; and it furthermore consists in the combination of a limekilndivided into compartments, as aforesaid, and provided with a furnace foreach of said compartments, and-a blower having its blast communicatingwith said furnaces, all as hereinafter more fully described.

In the accompanying drawings, Figure 1 is a vertical transverse sectionof my improved limekiln; Fig. 2, a section at right angles to that shownin Fig. 1, and on the line mac; and Fig. 3 is a side view of theexterior of the kiln.

Similar letters of reference indicate correspondin g parts.

Arepresents the chamber or stack of the limekiln, in the usual form of astout massive chimney, through the top of which the limestone to beburned is introduced in thekiln. Across the center of the chamber A isbuilt a partition, B, which extends from the base of said chamber partway the height of same, and thus divides the lower portion of the kilninto compartments O 0. Each of these compartments is provided at thebottom with two dischargeopeni-ngs, D and D, arranged one above theother, as shown in Fig. 2 of the drawings. Between the saiddischarge-openings is a horizontal slide, E, arranged to intercept thepassage oflimeto the lower discharge-opening, D.

F F are fire arches or furnaces located outside the kiln-chamber, andcommunicating, respectively, with the compartments 0 O. G G

denote air-pipes, connected at one end with a suitable blower, H, andhaving their discharge end communicating, respectively, with thefurnaces F F through the fire-grate thereof, the blast being regulatedand controlled by a suitable valve, as indicated at n.

The operation of my improved kiln is as follows: The stack A beingcharged with limestone and the requisite heat applied thereto, throughthe furnaces F F, to convert said stone into lime, the latter is drawnthrough one of the discharge-openings, D D, according to the state ofburning-11. a, in case the lime is being burned faster at the front partthan at the rear part of the kiln, the slide E is forced inward tointercept the lime, and the lime is taken from the front and out throughthe upper door, D. If the lime is being burned faster at the rear thanat the front of the kiln, the slide E is partly drawn outward to allowthe lime at the rear of the kiln to escape to the lowerdischarge-opening, D, from whence it is drawn, the upper door, D, beingclosed to retain the lime at the front of the kiln-ch amber. If,however, the kiln operates unifornily, the slide E is entirely withdrawnand the lime taken from the lower door, D, as in an ordinaryperpetualdraw kiln.

.Each of the compartments 0 0 being provided with the before-describedarrangement of discharge-openings, and with a separate furnace, E,allows the several sections of the kiln to be operated and regulatedindependent of each other, and thus affords perfect control of theburning process.

The employment of the blower, in connection with the furnaces of therespective compartments 0 C, greatly facilitates the regulating of theheat in the kiln, and serves to render the 5 chamber A, of the partitionB, slide E, discharge-openings D D, furnaces F, and blowertion B,extended above the fire-arches, the slide E, and discharge-openings D D,substantially as set forth and shown.

3. The combination, with the vertical kilnthis 3d day of May, 1880.

ROBERT DUNLOP. Witnesses E. LAASS,

pipe G, substantially as set forth and shown.

WM. 0. RAYMOND.

In testimony whereof I have hereunto signed my name and affixed my seal,in the presence of two attesting witnesses, at Syracuse, in the 10county of Onondaga and State of New York,

